That's one of the costs of liberty. The government will need to find another way.
The barrier to banning something in the interests of national security must be much higher than "this could be used by our enemies." That's the entire basis for the War on a Terror, the Patriot Act, and the NSA spying on Americans, and I won't stand for it. It's also the same idea as banning books, that's just not how a free society works.
You combat misinformation through integrity and transparency, not bans.